GOODWILL AND INTANGIBLE ASSETS - Schedule of Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (1,188)
Net Carrying Value	33,575
Indefinite-lived intangible assets	1,652
Intangible assets, gross carrying value	36,415
Intangible assets, net	35,227	$ 185
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	22,000
Accumulated Amortization	(964)
Net Carrying Value	$ 21,036
Weighted Average Remaining Useful Life - Years	3 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 12,000
Accumulated Amortization	(158)
Net Carrying Value	$ 11,842
Weighted Average Remaining Useful Life - Years	10 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 600
Accumulated Amortization	(26)
Net Carrying Value	$ 574
Weighted Average Remaining Useful Life - Years	3 years
Domain names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 163
Accumulated Amortization	(40)
Net Carrying Value	$ 123
Weighted Average Remaining Useful Life - Years	12 years